Modeling and Simulation of Control System for Bearingless Permanent Magnet-type Motors

To realize the radial displacement sensorless operation for a permanent magnet type bearingless motor(PMBLM) in the dynamic process,a method of using the flux of bearingless permanent magnet-type synchronous motor(BPMSM) to calculate rotor radial displacement was proposed,detective system of rotor radial displacement was set up and simulation was carried out.The results of simulation suggest that the detective system can detect rotor radial displacement exactly,therefore,it can replace the displacement sensors to realize the steady operation of the motor.